package com.wmcom.wm.controller;

import com.wmcom.wm.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.UUID;
/**
 *
 * 文件上传和下载
 */
@RestController
@Slf4j
@RequestMapping("/common")
public class CommonController {
    @Value("${reggie.path}")
   private String basePath;
    /**
     *文件上传
     */
    @PostMapping("/upload")
    public R<String> upload(MultipartFile file){
         log.info(file.toString());
          //获得图片的，名字
        String filename = file.getOriginalFilename();
        String suffix = filename.substring(filename.lastIndexOf("."));
        //使用UUID随机生成文件名
        filename= UUID.randomUUID() + suffix;
        //判断存储的目录是否存在
         File dir=new File(basePath);
          if (!dir.exists()) {
              dir.mkdirs();
          }
        //把图片写到硬盘中
        try {
            file.transferTo(new File(basePath + filename));
        } catch (IOException e) {
            e.printStackTrace();
        }
        return R.success(filename);
    }
    /**
     *
     * 文件下载
     */

    @GetMapping("/download")
    public void download(String name, HttpServletResponse response) {
        ServletOutputStream outputStream = null;
        try {
            FileInputStream io = new FileInputStream(basePath + name);
            outputStream = response.getOutputStream();
            response.setContentType("image/jpeg");
            int len = 0;
            byte[] bytes = new byte[1024];
            while ((len = io.read(bytes)) != -1) {
                outputStream.write(bytes, 0, len);
                outputStream.flush();
            }
            io.close();
            outputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
